Lathe



April 18, 1933. H. w. MELLING LATHE Filed Sept. 15, 1930 3 Sheets-Sheet 1 IVNVENTOR Herman WWW/1217 Y Y fim fl I April 18, 1933. H. w. MELLING LATHE Filed Sept. 13, 1930 3 Sheets-Sheet 2 INVENTOR emu/2M Wei/m ATTORNEYS April 18, 1933. w. MELLING LATHE I Filed Sept. 13, 1950 3 Sheets-Sheet 3 INVENTOR mm? W fig/7 v He ATTORNEYS -v 25 .Fig.f1'is a fragmentary/ front, perspecti e Patented Apr, .18,"

"termination :filed sl l inber 13, 1 330. sen-a1 n 4siss5 of the class illustratedinLe'tters, Patent No.

21,634,550 issued to me July 5,1927.

a The main objectsofzthisinvention are: First, to provide; anriniproved lathe for turning non-circular forms such as cams, which is ofvery large capacity. ,e-J; Second, to provide an improved pattern reproducing lathe in: whichnon-circular 10 forms such as cams may be Very rapidlyand accurately produced. withia comparatively small allowance for tolerance. I Third,;to rprovide a' machine having these advantages which does not? become clogged 1:15 or: inoperative inpuse, theechi ps 'beingdis- 1 (charged :so {that they do not enter bearing parts. f I: v

y;- Objects pertaining to details and'economies of my; inventionwill definitely appear from l ill the Psi I r Aistructure which; embodies thefeatures of my invention is clearly illustrated in the saccompanying drawings, which i 1 the description to follow. invention is lviewofmy ijllril'lrovedlathe; A H r E Fig. 21 is= an enlarged. fragmentary I view partially in transverse section on line ofFigLBI H l Fig. 3 is a fragmentary jsectiononflllne 3 0 7 i I Fig. 4; i'sa fragmentary. section correspond ging to that of Fig.2 showing the p'arts; in an other position.

"135 Y :Fig.f5 is a fragmentary detailtiew ing still another relation ofthe tool to l1 Fig. is a fragmentary vert cal section illustrating a modified form or embod ment 4 of my invention.

. -Referr1ng to the-,drvihgs, 1' of.

the machine is provided with a way 2 for the i work carriage 3, which is mounted on the "and carries theichucks for the work l. No

means are provided ior QCOIllZI'QlliIlg or adjusting the carriage as such neans forrn no "parrot my present invention, and as ani efficient ineans is illustratedand described in "Letters Patent No. 1,512,599 issuedto me the -rear.ofthe,carr age'waiys:2 I I j rollerx9'isicarried -byasupportfldslidably 1 i mounted on thecarriageand adjustedflthere g aspiring presseddetent '12 holdsthis"screw -inl'ts ad-f lusted positionsan 5 The abutment fcoacts of this {cam '13 being v recess. I way for longitudinal and lateral movement scribe theme'chanism'in detailherein."

a "carriage being provided. for each; cam zfor bed of-"the machineglsalso -prov ded H shape to' beam .gThe work .linfthe embodir= ment illustrated :lS a cam shaft provided l with eight gcamsQ-and therefore there .are

eight carriage units. ,The. several carriages" .edon v the upwardly projecting;flange i8' at on byimejans of the"screw--11. The

I with. ltiie lfiijgst rfl 61% carriage .control "cam 1 3,:"arr'anged between the J abutment roller .and' thewwork,thei axis of theabutnientroller andthe work. 1 V

'In practice, where the work isa earn shaft,

- in the pans 0f the axis .are mounted for independent reciprocating. .movelnent transverse to. the;axisof the work. and, as theicarriages orl tool holders mounted i thereon; arelduplicates, a .descriptiongof one a by ;means of; thespringffi whichis supported I at Its. rear end; by-the adjusti ng .or' tensiohing 1 screw 7 ;Theseitensioningifscrewsaremiounu ya fnz'tster carnshaft, which :is a replica :ofthe work, is mounted inthe idrliving means sorthat theiseveral carriag s-areactuate'd-inprope y timedreletionm as l ,The tool carriageisprovided with a verticalrece'ss 14 for the tool holder 15.1 'Theside walls' 'of thisrecessiare preferablyiingsup portingenga'gement with the sidesofv thetool holder, that'is, while the tofol holder isPi'reeEQD V to reciprocate oroscillate this recess,"it isg supported laterally by theside wallsof zithe to which the'spring19 is connectedythe rear" endofjthe spring being engaged withthe upder parallel A holder. The upper link 17 is providedwith a 1 "rearwardly andupwardly'projecting 18.

he'abutnient an r I so ' it is believedthatithese disclosures rwill enwardly projecting arm 20 on the tool carriage." This spring acts to urge the tool hol-' der upwardly, pressing-its roller 21 against the tool holder actuating cam 22' which is arranged} above the tool'holder and in a plane above thework. a

.The tool 23 ismounted on the tool holder j to face downwarfdly and the work is rotated [so that the cut isdownward and the rchipsrare' discharged downwardly. By this arrange ment ofparts'the chips 'and'debris' are di s-' v charged downwardly away from bearing and working parts and, further, the tool holder actuating cam engages directly with the tool holder or the roller 21 thereon so that there is no lostl motion in operating connections.

The: cams; 22 111215 be made of very large size thusavoiding cams with abrupt lifts, and bythis arrangement the tool oractuating cammay be-readilyplatte'd so that the reciprocatingmovement of the carriage is not r'e-v fle-cted in the work, that ;is, the variationi-n the vertical plane of the tool holder relative to. thevtoolgholder actuatingcam is-Veasily compensated. V

' Myhimproved lathe isof very large capacity and: capable of reproducing-the master cams ora-pattern: cams with great accuracy.

' lnthemodifi'cation shown in jFi'ge6-thetool holder- 24 is oscillatingly mounted on the pivot 25,3, push rod-26 being pivotally connected 'to-thetooliholder: at 27 and to the link 28 V which; correspondsjlto' the -link:1-7 in-the em- :bod'imentvpreviously described; This push toolISO-isv mounted do vvnwardlyn I V gagesthe-slot in'the'tool carriagel w ve illustrated and described my-Lgim rod26iis' provided with'a roller 29 which co act slwith the too-lholder actuating cam The on'the holder 24eto face Inthe preferred embodimentthe tbolholder is provided with a rearwardly projectingi finger 31 which engages in the slot 82 in thetool carriage to. assist .in Smopor'ting and guiding the tool holder. In theembodiment shown'in Fig.6 the push .rod'26is provided with a corresponding ,;finger :which, en-

pro'vements in a ver practicalembodiment. Ihave not attempted to illustrate or describe certain other embodiments oradaptations as able'lthose skilled in the'art to embody g0! adapt my improvements as may be desired. 1

' Havingthus describedumy inventionwhat 'I claimasimw and desire tosecureyby Letters Patenttisz I I 7 "1; "In a structure the described, the combination of a rotary work holder, a V j tool: carriage reciprocating transversely of v '60 f carriage towardgthe work, a tool carriage con- .trolcamwhich is a replicalofthe shape of the the work holder, a'spring acting to urge said I I work to be cut, a to'olholder,a pair of paralleli supporting links "for said ,tool iholder mounted on; said carriage, one ,of said supporting links being provided with a rear- V 'wardly projecting arm, a spring connected to said arm and acting to urge said tool holder upwardly, a tool mounted on said tool holder to face downwardly, a tool holder'ac tuating. cam i'nountedabove said tool holder and in a plane above theplaneof -the;work,

and a roller" on said tool h'older coacting wlth a I said cam. I i v a I 2. In a structure of the class described,"the

combination of 'a rotary work holder, a tool carriage reciprocating transversely of the work holder, asp'ring actingto urge saidcarriagetoward .thework, a tool carriage control cam which is a replica of the shapeof: the work -to'be out, -a"*tool fholder, -f a pair of parallel supporting links for saidf to'ol holder mounted on said carriage, aspring acting to"urgesaid :tool holder inwardly, a tool mounted on 'said ftool holder tor-face downwardly, a tool holder 'actuatingcam mounted abovesaidtool holder-and ink-a plane above the plane or; the work, i and a roller on said-tool holderi-coactingwith" said Gil/H1. Y f t 1 1, I 3. In a structure oifjthe class:des'cribed,v the combination of a rotarywork-holdr, a tool V carriage reciprocating: transversely} (if-the r work holden-a itool carriage-"controlrcam, 1'95 porting linksfor sai -13 1001 holderamountedd" on said carriage, one of said supporting-links a tool, a toolholder, a pair of parallel: sup

being providedwitlr a rearwardlyprojecting arm, a sp'ringconnejcted to said arm and 'act- 'i-ngto urgesaidtool holder upwardlw-a tool 5 9 Y holder actuating camlmounted abovasaid 7 a tool holder and jiIr-{a-plane above the pl ane "of the work, andia roller on coacting with said cam 14.'I'n a structurefof e'class described, the

ing links for said'tool holder mounted ,On

cam;

' [5, In astructure of the class described-the 7 a combination of arotary worlrholderja tool 1 carriage reciprocating transversely, of" the} 5 o workholder, a spring acting to urgesaid; tool carriage toward'the work','"a ftooli cari riage control camwhich is v af replica arr-n 1 roller'on-said tool holder c'oacti'ng v'vith-Said Shape of the work to :be-cutJa" tool, a, tool holder,. alsupport forfsaid tool," holder. com;-

prising a pain of parjallel; links pivotally V mounted on said carriage, "one! of said, links e e pr d d w l n r a spr n 91 nected to said arm and; acting to, urge the tool holder upwardly, and a cam mounted above and in coacting relation to said "tool holder.

6. In a structure of the class described,'thea combination of a rotary work holder,-a tool carriage reciprocating transverselyof the Work holder, a tool carriage control'cam, a .tool,'a tool holder, a support for said tool y holder comprising a pair of parallel links pivotally mounted on saidcarriage, a spring acting to urge thev tool holder upwardly, and a cam mounted above and coacting rela-w.

tion to saidtool holder. V 7. In a structure of the class described, the

combination of a rotary workholder, a tool carriage reciprocating transversely of said work holder, a tool holder mounted onsaid tool carriage toreciprocate transversely of the path of the tool carriage, atool mounted I on said tool holderto face downwardly, a" i tool holder actuating cammounted above said tool holder to actdirectlythereon, and

a spring acting to urge, said'tool holder against said actuating cam.

8. Ina structure of the class described, the a combination of a rotary workholdema tool carriage reciprocating transversely: of said 7 V Work holder, a tool, a tool holder mounted on 1 said tool carriage to reciprocate transverse- :lyof the path, of the carriage, andatool holder actuating cammounted above said tool' holder to coact therewith.

HERMAfI w; MELLING.

my hand; 

